Influence of Absolute Basicity and Capillary Porosity on Carbonation of Concrete  

作　　者：巴明芳 

机构地区：[1]School of Materials Science and Engineering, Southeast University [2]Jiangsu Key Lab of Construction Materials

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2010年第5期889-892,共4页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the National Basic Research Program of China(No.2009CB623200);Nanjing Key Construction Project (No.7612005822)

摘　　要：The single influence of capillary porosity and coupling effects of absolute basicity and capillary porosity on concrete carbonation were investigated. The experimental results showed that carbonation rate of concrete at a given absolute basicity （AB） increased moderately with the increase of the porosity ranging from 6.2% to 9.25%, and increased rapidly with porosity from 9.25% to 12.8%.The coupling effect mainly embodied in disappeared mutation point of capillary porosity, and the distributing regions of carbonation depth were clearly partitioned in the coupling influence of absolute basicity and capillary porosity. A design method on carbonation related durability of concrete based on the coupling effects was proposed.The single influence of capillary porosity and coupling effects of absolute basicity and capillary porosity on concrete carbonation were investigated. The experimental results showed that carbonation rate of concrete at a given absolute basicity （AB） increased moderately with the increase of the porosity ranging from 6.2% to 9.25%, and increased rapidly with porosity from 9.25% to 12.8%.The coupling effect mainly embodied in disappeared mutation point of capillary porosity, and the distributing regions of carbonation depth were clearly partitioned in the coupling influence of absolute basicity and capillary porosity. A design method on carbonation related durability of concrete based on the coupling effects was proposed.

关 键 词：absolute basicity capillary porosity coupling effects carbonation rate 

分 类 号：TU528[建筑科学—建筑技术科学]